FERMENTASI SUBSTRAT PADAT DAN FERMENTASI SUBSTRAT CAIR PADA PRODUKSI ASAM LAKTAT DARI KULIT PISANG DENGAN RHIZOPUS ORYZAE

Abstract: Indonesia is one of the major banana producing countries in the world. There are many varieties of banana grown in Indonesia. While the fruit is valuable for consumption, banana peels mostly are discarded as waste. In fact, banana peels are high in nutrition, thus they are potential to be converted into other valuable products such as lactic acid. The objective of this research was to study the effect of fermentation methods, i.e. solid substrate fermentation and liquid substrate fermentation, in the production of lactic acid from banana peel waste by the fungus Rhizopus oryzae. There were three steps involved in this research: (1) preparation of fermentation medium, (2) banana peel fermentation, and (3) lactic acid purification and recovery by using Amberlite IRA-400 resin. In solid substrate fermentation, dried banana peels were firstly crushed, while in liquid substrate fermentation, fresh banana peels were extracted by water. Following this, banana peel powder and extract banana peel were inoculated with Rhizopus oryzae and incubated at 30 oC for 144 h. As results, the yield of lactic acid produced from solid substrate fermentation (0,79 g lactic acid/g starch) was higher than that from liquid substrate fermentation (0,15 g lactic acid/g starch).

Keywords: lactic acid; liquid fermentation; solid state fermentation; banana peel; Rhizopus oryzae

Penulis: Ery Susiany Retnoningtyas, Aning Ayucitra, Fandy Maramis, Ong Wei Yong, Frengky W. Pribadi dan Nelsi K. Tanti

Kode Jurnal: jpkimiadd130119

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